

/* 头部 */
.head{
    height: 68px;
    width: 100%;
    border-bottom: 1px solid #aec7ec;
    box-sizing: border-box;
    position: absolute;
    z-index: 999;
}
/* 头部导航 */
.head-nav{
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}
.head-nav li{
    float: left;
    line-height: 66px;
    font-size: 16px;
    text-align: center;
    margin-right: 38px;
}
.head-nav li a{
    color: #fff;
}
.head-nav li:hover{
    border-bottom: 3px solid #fff;
}
.head-nav .active{
    border-bottom: 3px solid #fff;
}
/* 头部登录按钮 */
.head-login a{
    float: left;
    margin-right: 10px;
    font-size: 12px;
    line-height: 22px;
    text-align: center;
    color: #fff;
}
.head-login a:hover{
    opacity: 0.7;
}
.head-login .login{
    width: 55px;
    border-radius: 10px;
    border: 2px solid #ccc;

}
.head-login .register{
    width: 74px;
    border-radius: 10px;
    background-color: #ed510a;
    border: 2px solid #ed510a;
}
/* 粒子效果 */
.banner {
    position: relative;
    top: 0px;
    left: 0px;
    height: 360px;
    width: 100%;
    background: #f1f1f1;
    background: radial-gradient( at center, #1d1d1d, #1d1d1d);
}

#particles-js {
    background-size: cover;
    background-position: 50% 50%;
    background-repeat: no-repeat;
    width: 100%;
    height: 360px;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 0;
}
.banner-top{
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    height: 230px;
    padding-top: 100px;
    box-sizing: border-box;
    text-align: center;
    color: #fff;
}
.banner-top a{
    color: #fff;
    display: block;
    margin-bottom: 15px;
    font-size: 14px;
}
.center-box{
    position: relative;
}
.center-box h2{
    line-height: 60px;
    color: #000;
}
.center-box h2::after{
    content: '';
    display: block;
    width: 16px;
    height: 2px;
    background-color: #1271ef;
    position: absolute;
    top: 50px;
}
.center-box h2 span{
    font-size: 16px;
    color: #999;
}
.center-box .box-ul li{
    float: left;
    width: 360px;
    height: 340px;
    box-sizing: border-box;
    border: 1px solid #eee;
    margin-right: 60px;
    padding: 10px;
    cursor: pointer;
}
.center-box .box-ul li img{
    width: 100%;
}
.center-box .box-ul li:last-child{
    margin-right: 0;
}
.center-box .box-ul li h3{
    line-height: 40px;
}
.center-box .box-ul li p{
    font-size: 12px;
    line-height: 16px;
    color: #666;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
    overflow: hidden;
}
.center-box .box-ul li .a{
    color: #1271ef;
    font-size: 12px;
}
.Partners ul li{
    float: left;
    width: 360px;
    height: 120px;
    box-sizing: border-box;
    margin-right: 60px;
    margin-bottom: 20px;
    padding-top: 40px;
    background-color: #fff;
    text-align: center;
}
.Partners ul li img{
    height: 40px;
}
.Partners ul li:nth-child(3n){
    margin-right: 0;
}
.floor{
    width: 80px;
    height: 150px;
    font-size: 14px;
    text-align: center;
    position: absolute;
    left: 50%;
    margin-left: 620px;
    top: 500px;
    line-height: 30px;
    
}
.floor p{
    box-sizing: border-box;
}
.fix{
    position: fixed;
    top: 20px;
}
.floor .active::before{
    content: '';
    display: inline-block;
    width: 10px;
    height: 2px;
    background-color: #1271ef;
    position: relative;
    top: -5px;
    left: -2px;
}